From 094be07692101a0e215fbe6a8cd7c3c6a7e2b7b5 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 26 May 2016 05:13:54 +0000
Subject: ruby.h: count and verify

* include/ruby/ruby.h (rb_scan_args_count): verify length with
  counting variables together.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55173 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 include/ruby/ruby.h | 123 ++++++++++++++++++++++------------------------------
 1 file changed, 52 insertions(+), 71 deletions(-)

(limited to 'include/ruby')

diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 234ccd9fbc..a76576c890 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -2164,90 +2164,71 @@ ERRORFUNC(("variable argument length doesn't match"), int rb_scan_args_length_mi
 # endif
 
 # define rb_scan_args_isdigit(c) ((unsigned char)((c)-'0')<10)
-
-# define rb_scan_args_count_block(fmt, ofs) \
-    ((fmt)[ofs]=='&')
-
-# define rb_scan_args_count_hash(fmt, ofs) \
-    ((fmt)[ofs]!=':' ? \
-     rb_scan_args_count_block(fmt, ofs) : \
-     rb_scan_args_count_block(fmt, (ofs)+1)+1)
-
-# define rb_scan_args_count_trail(fmt, ofs) \
-    (!rb_scan_args_isdigit((fmt)[ofs]) ? \
-     rb_scan_args_count_hash(fmt, ofs) : \
-     ((fmt)[ofs]-'0') + rb_scan_args_count_hash(fmt, (ofs)+1))
-
-# define rb_scan_args_count_var(fmt, ofs) \
-    ((fmt)[ofs]!='*' ? \
-     rb_scan_args_count_trail(fmt, ofs) : \
-     rb_scan_args_count_trail(fmt, (ofs)+1)+1)
-
-# define rb_scan_args_count(fmt) \
-    (!rb_scan_args_isdigit((fmt)[0]) ? rb_scan_args_count_var(fmt, 0) : \
-     !rb_scan_args_isdigit((fmt)[1]) ? rb_scan_args_count_var(fmt, 1)+(fmt)[0]-'0' : \
-     rb_scan_args_count_var(fmt, 2)+(fmt)[0]-'0'+(fmt)[1]-'0')
-
-# define rb_scan_args_lead_p(fmt) rb_scan_args_isdigit((fmt)[0])
-# define rb_scan_args_n_lead(fmt) (rb_scan_args_lead_p(fmt) ? (fmt)[0]-'0' : 0)
-# define rb_scan_args_opt_p(fmt) (rb_scan_args_lead_p(fmt) && rb_scan_args_isdigit((fmt)[1]))
-# define rb_scan_args_n_opt(fmt) (rb_scan_args_opt_p(fmt) ? (fmt)[1]-'0' : 0)
+# define rb_scan_args_count_end(fmt, ofs, varc, vari) \
+    (((varc) \
+      /(!fmt[ofs] || rb_scan_args_bad_format(fmt))) \
+     /((varc)==(vari) || rb_scan_args_length_mismatch(vari, varc)))
+
+# define rb_scan_args_count_block(fmt, ofs, varc, vari) \
+    (fmt[ofs]!='&' ? \
+     rb_scan_args_count_end(fmt, ofs, varc, vari) : \
+     rb_scan_args_count_end(fmt, ofs+1, varc, vari+1))
+
+# define rb_scan_args_count_hash(fmt, ofs, varc, vari) \
+    (fmt[ofs]!=':' ? \
+     rb_scan_args_count_block(fmt, ofs, varc, vari) : \
+     rb_scan_args_count_block(fmt, ofs+1, varc, vari+1))
+
+# define rb_scan_args_count_trail(fmt, ofs, varc, vari) \
+    (!rb_scan_args_isdigit(fmt[ofs]) ? \
+     rb_scan_args_count_hash(fmt, ofs, varc, vari) : \
+     rb_scan_args_count_hash(fmt, ofs+1, varc, vari+(fmt[ofs]-'0')))
+
+# define rb_scan_args_count_var(fmt, ofs, varc, vari) \
+    (fmt[ofs]!='*' ? \
+     rb_scan_args_count_trail(fmt, ofs, varc, vari) : \
+     rb_scan_args_count_trail(fmt, ofs+1, varc, vari+1))
+
+# define rb_scan_args_count_opt(fmt, ofs, varc, vari) \
+    (!rb_scan_args_isdigit(fmt[1]) ? \
+     rb_scan_args_count_var(fmt, ofs, varc, vari) : \
+     rb_scan_args_count_var(fmt, ofs+1, varc, vari+fmt[ofs]-'0'))
+
+# define rb_scan_args_count(fmt, varc) \
+    (!rb_scan_args_isdigit(fmt[0]) ? \
+     rb_scan_args_count_var(fmt, 0, varc, 0) : \
+     rb_scan_args_count_opt(fmt, 1, varc, fmt[0]-'0'))
+
+# define rb_scan_args_lead_p(fmt) rb_scan_args_isdigit(fmt[0])
+# define rb_scan_args_n_lead(fmt) (rb_scan_args_lead_p(fmt) ? fmt[0]-'0' : 0)
+# define rb_scan_args_opt_p(fmt) (rb_scan_args_lead_p(fmt) && rb_scan_args_isdigit(fmt[1]))
+# define rb_scan_args_n_opt(fmt) (rb_scan_args_opt_p(fmt) ? fmt[1]-'0' : 0)
 # define rb_scan_args_var_idx(fmt) \
-    (!rb_scan_args_lead_p(fmt) ? 0 : !rb_scan_args_isdigit((fmt)[1]) ? 1 : 2)
-# define rb_scan_args_f_var(fmt) ((fmt)[rb_scan_args_var_idx(fmt)]=='*')
+    (!rb_scan_args_lead_p(fmt) ? 0 : !rb_scan_args_isdigit(fmt[1]) ? 1 : 2)
+# define rb_scan_args_f_var(fmt) (fmt[rb_scan_args_var_idx(fmt)]=='*')
 # define rb_scan_args_trail_idx(fmt) \
     (rb_scan_args_lead_p(fmt) ? \
-     (rb_scan_args_isdigit((fmt)[1]) || (fmt)[1]=='*')+1 : \
-     ((fmt)[0]=='*'))
+     (rb_scan_args_isdigit(fmt[1]) || fmt[1]=='*')+1 : \
+     (fmt[0]=='*'))
 # define rb_scan_args_trail_p(fmt) \
     (rb_scan_args_lead_p(fmt) ? \
-     (rb_scan_args_isdigit((fmt)[1]) || (fmt)[1]=='*') && \
-     rb_scan_args_isdigit((fmt)[2]) : \
-     (fmt)[0]=='*' && rb_scan_args_isdigit((fmt)[1]))
+     (rb_scan_args_isdigit(fmt[1]) || fmt[1]=='*') && \
+     rb_scan_args_isdigit(fmt[2]) : \
+     fmt[0]=='*' && rb_scan_args_isdigit(fmt[1]))
 # define rb_scan_args_n_trail(fmt) \
     (rb_scan_args_lead_p(fmt) ? \
-     ((rb_scan_args_isdigit((fmt)[1]) || (fmt)[1]=='*') && \
-      rb_scan_args_isdigit((fmt)[2]) ? (fmt)[2]-'0' : 0) : \
-     ((fmt)[0]=='*' && rb_scan_args_isdigit((fmt)[1]) ? (fmt)[1]-'0' : 0))
+     ((rb_scan_args_isdigit(fmt[1]) || fmt[1]=='*') && \
+      rb_scan_args_isdigit(fmt[2]) ? fmt[2]-'0' : 0) : \
+     (fmt[0]=='*' && rb_scan_args_isdigit(fmt[1]) ? fmt[1]-'0' : 0))
 # define rb_scan_args_hash_idx(fmt) \
     (rb_scan_args_trail_idx(fmt)+rb_scan_args_trail_p(fmt))
-# define rb_scan_args_f_hash(fmt) ((fmt)[rb_scan_args_hash_idx(fmt)]==':')
+# define rb_scan_args_f_hash(fmt) (fmt[rb_scan_args_hash_idx(fmt)]==':')
 # define rb_scan_args_block_idx(fmt) \
     (rb_scan_args_hash_idx(fmt)+rb_scan_args_f_hash(fmt))
-# define rb_scan_args_f_block(fmt) ((fmt)[rb_scan_args_block_idx(fmt)]=='&')
+# define rb_scan_args_f_block(fmt) (fmt[rb_scan_args_block_idx(fmt)]=='&')
 # define rb_scan_args_end_idx(fmt) \
     (rb_scan_args_block_idx(fmt)+rb_scan_args_f_block(fmt))
 
-# define rb_scan_args_validate(fmt, varc) \
-    (!rb_scan_args_isdigit((fmt)[0]) ? \
-     rb_scan_args_validate_var(fmt, 0, varc) : \
-     !rb_scan_args_isdigit((fmt)[1]) ? \
-     rb_scan_args_validate_var(fmt, 1, (varc-(fmt)[0]+'0')) : \
-     rb_scan_args_validate_var(fmt, 2, (varc-(fmt)[0]+'0'-(fmt)[1]+'0')))
-# define rb_scan_args_validate_var(fmt, ofs, varc) \
-    ((fmt)[ofs]=='*' ? \
-     rb_scan_args_validate_trail(fmt, ofs+1, (varc-1)) : \
-     rb_scan_args_validate_trail(fmt, ofs, varc))
-# define rb_scan_args_validate_trail(fmt, ofs, varc) \
-    (rb_scan_args_isdigit((fmt)[ofs]) ? \
-     rb_scan_args_validate_hash(fmt, ofs+1, (varc-1)) : \
-     rb_scan_args_validate_hash(fmt, ofs, varc))
-# define rb_scan_args_validate_hash(fmt, ofs, varc) \
-    ((fmt)[ofs]==':' ? \
-     rb_scan_args_validate_block(fmt, ofs+1, (varc-1)) : \
-     rb_scan_args_validate_block(fmt, ofs, varc))
-# define rb_scan_args_validate_block(fmt, ofs, varc) \
-    ((fmt)[ofs]=='&' ? \
-     rb_scan_args_validate_end(fmt, ofs+1, (varc-1)) : \
-     rb_scan_args_validate_end(fmt, ofs, varc))
-# define rb_scan_args_validate_end(fmt, ofs, varc) \
-    ((fmt)[ofs]?rb_scan_args_bad_format(fmt):!(varc))
-
-# define rb_scan_args_verify(fmt, varc) \
-    ((varc)\
-     /(rb_scan_args_validate(fmt, varc)|| \
-       rb_scan_args_length_mismatch((varc), rb_scan_args_count(fmt))))
-
 # define rb_scan_args0(argc, argv, fmt, varc, vars) \
     rb_scan_args_set(argc, argv, \
 		     rb_scan_args_n_lead(fmt), \
@@ -2256,7 +2237,7 @@ ERRORFUNC(("variable argument length doesn't match"), int rb_scan_args_length_mi
 		     rb_scan_args_f_var(fmt), \
 		     rb_scan_args_f_hash(fmt), \
 		     rb_scan_args_f_block(fmt), \
-		     rb_scan_args_verify(fmt, varc), vars)
+		     rb_scan_args_count(fmt, varc), vars)
 ALWAYS_INLINE(static int
 rb_scan_args_set(int argc, const VALUE *argv,
 		 int n_lead, int n_opt, int n_trail,
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